Comparison

年号電卓Plus vs Simple Calculator Multi

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

年号電卓Plus

Easily convert between Western and Japanese eras, and determine birth years from age. Explore historical context with explanations for era changes and significant events of each year.

Highlights
  • Western to Japanese era conversion
  • Japanese era to Western conversion
  • Calculate birth year from age
  • View era start and end dates
  • Understand reasons for era changes
  • Discover major events of each year
Features
Read full description

年号・元号の変換に迷ったら、このアプリひとつで解決! 待望の西暦和暦早見表に対応しました! 西暦⇔和暦の変換から、年齢での誕生年検索まで、日常のちょっとした疑問をすばやく解消できます。 さらに Apple Watch に対応! 手首でサッと確認できるようになりました。 調べるだけでなく、改元の理由やその年の主な出来事もわかるので、歴史の勉強や雑学としても楽しめます。 【変換モード】 ・西暦 → 和暦(令和・平成・昭和・大正・明治) ・各元号 → 西暦 ・年齢 → 西暦・和暦(誕生年を逆算) 【詳細情報】 ・各元号の開始年・終了年を表示 ・改元の理由(iPhone版のみ) ・その年の主な出来事 ※Apple Watch版では改元理由の表示はありません。 【iPhone版・Apple Watch版の違い】 ・iPhone版は西暦和暦早見表に対応。 ・iPhone版はテンキー入力に対応。和暦の上限を超えた年(例:大正16年)をそのまま入力・表示しながら、西暦や次の元号への変換結果を確認できます。 ・Apple Watch版はテンキー入力の代わりにカウント操作を採用。和暦の上限に達すると自動的に次の元号へ切り替わるため、直感的に操作できます(例:大正15年の次は自動で昭和2年に)。 【Apple Watch版の操作】 ・上にスワイプすることで、年齢・各元号の開始年/終了年・その年の主な出来事をまとめて確認できます。 ・+/-ボタンの長押しで高速カウントアップ/カウントダウンが可能。目的の年にすばやくたどり着けます。

About

Simple Calculator Multi

Features
Read full description

This is a simple calculator that comes in handy when you want to do some quick calculations. It does not display ads and does not use unnecessary permissions. It supports multiple screens, so you can perform multiple calculations at the same time. You can change the look and feel with themes and customize it yourself. How to operate - Clear Button long press ... All clear - Backspace Button long press... Clear. - Screen long press - Copy or Paste - History long press... Copy or delete history. - Custom Theme long press... Delete or Rename.

Screenshots

年号電卓Plus4 screens
Simple Calculator Multi4 screens

Verdict

The call

The clearest difference is update cadence: 年号電卓Plus at every 6 weeks against Simple Calculator Multi's every 13 months. Simple Calculator Multi's advantage is iOS requirement (15.1 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

年号電卓Plus ships an update every 6 weeks, Simple Calculator Multi every 13 months. The most recent releases landed on October 12, 2026 and October 2, 2026 respectively.

Scorecard2 real differences · 6 level
年号電卓Plus versus Simple Calculator Multi: the parameters behind the verdict, then further details
Parameter年号電卓PlusSimple Calculator Multi
PriceFreeFree
Positive reviews37.5% of reviews—
Update frequencyEvery 6 weeks — betterEvery 13 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS17.615.1 — better
Further details — not scored
Size7 MB25 MB
Age rating4+4+
DeveloperNakanishi Toshihikotadashi endo

In-app purchases

None

年号電卓Plus

No in-app purchases

None

Simple Calculator Multi

No in-app purchases

Questions

Is 年号電卓Plus free?
年号電卓Plus is free to download, with no in-app purchases.
Is Simple Calculator Multi free?
Simple Calculator Multi is free to download, with no in-app purchases.
Do 年号電卓Plus or Simple Calculator Multi have ads?
Neither 年号電卓Plus nor Simple Calculator Multi shows ads.
Which is updated more often, 年号電卓Plus or Simple Calculator Multi?
年号電卓Plus ships an update every 6 weeks, and Simple Calculator Multi every 13 months. Most recently, 年号電卓Plus was updated on October 12, 2026 and Simple Calculator Multi on October 2, 2026.

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